Senior Front-End Developer

Department: IT

Employment Type: Full Time

Location: Northumberland, ENG, Cramlington, Hybrid

Key Responsibilities

• Own the architecture, development and continuous improvement of Shopify themes across multiple storefronts and international markets.
• Turn customer insight, commercial priorities and design concepts into high-quality, reusable front-end experiences that improve conversion and customer experience.
• Lead optimisation of storefront performance, accessibility, responsiveness and Core Web Vitals.
• Partner with e-commerce, marketing and creative teams to deliver data-informed improvements through experimentation, analytics and CRO initiatives.
• Establish and maintain front-end engineering standards, component libraries, testing practices and technical documentation.
• Assess and implement new technologies, integrations and third-party applications that enhance customer experience and business performance. 
• Take ownership of projects from discovery and technical design through implementation, release and post-launch monitoring, working independently with minimal supervision.
• Proactively identify technical debt, risks and opportunities for innovation, continuously improving both the storefront and development workflows 

Skills, Knowledge and Expertise

• Advanced Shopify Liquid development experience within Shopify Plus environments.
• Strong expertise in modern HTML, CSS and JavaScript, with a deep understanding of browser performance and rendering behaviour.
• Experience building scalable, reusable front-end components for complex, high-traffic e-commerce websites.
• The ability to translate design concepts, UX requirements and customer needs into production-ready experiences.
• Strong knowledge of Git, code review processes, testing practices and modern deployment workflows.
• Commercial awareness, using analytics, experimentation and performance data to influence technical decisions and drive customer outcomes.
• Excellent communication skills with the ability to work across both technical and non-technical stakeholders and provide technical leadership.
• A proactive, self-directed approach with the ability to identify opportunities, solve problems independently and continuously improve platforms, processes and ways of working 

• Working with Shopify Storefront, GraphQL or REST APIs and integrating front-end experiences with third-party services 
• Developing Shopify Functions and UI Extensions using Preact for checkout, customer account and admin extensibility 
• Developing embedded Shopify admin apps using React Router, App Bridge and Polaris 
• Developing theme app extensions 
• Building server-side services, automations or edge functionality, including experience with Cloudflare Workers and related technologies 
• Implementing CRO and experimentation platforms, analytics implementation, feature flags or personalisation 
• Design systems, component libraries, visual regression testing or end-to-end testing tools 

• Analytical and focused - prioritising improvements that will have the greatest positive impact on the business 
• Strong initiative - proactively identifying improvements and potential issues early 
• Collaborative communicator - working effectively with technical and non‑technical teams 
• Adaptable - responding well to evolving e‑commerce, technology and Shopify platform changes 
• Motivated - with the ability to work to deadlines, manage workload, and deliver reliably 
• Precise - and with an impeccable eye for detail 

Benefits

• Competitive Salary, subject to skills and experience, with potential bonus and paid overtime
• Annual leave base starting at 25 days per year (+ bank holidays), ability to accrue holidays with each year’s service and annual leave purchase scheme
• Enhanced maternity and paternity pay
• Private health insurance
• Enhanced sickness pay
• Free Parking
• 2 Corporate Social Responsibility days per year
• Generous staff allowance and discount
• Free fresh fruit, snacks and drinks in office
• Individual social fund
• Bi-Annual Paid team outings
• Regular pay reviews